6     // Avoid unnecessary re-building.  in main()
7     println!("cargo:rerun-if-changed=build.rs");  in main()
17             "cargo:warning=\"libc's use_std cargo feature is deprecated since libc 0.2.55; \  in main()
18              please consider using the `std` cargo feature instead\""  in main()
29             println!("cargo:rustc-cfg=freebsd10")  in main()
31         Some(11) if libc_ci => println!("cargo:rustc-cfg=freebsd11"),  in main()
32         Some(12) if libc_ci => println!("cargo:rustc-cfg=freebsd12"),  in main()
33         Some(13) if libc_ci => println!("cargo:rustc-cfg=freebsd13"),  in main()
34         Some(14) if libc_ci => println!("cargo:rustc-cfg=freebsd14"),  in main()
35         Some(_) | None => println!("cargo:rustc-cfg=freebsd11"),  in main()
38     // On CI: deny all warnings  in main()
40         println!("cargo:rustc-cfg=libc_deny_warnings");  in main()
45         println!("cargo:rustc-cfg=libc_priv_mod_use");  in main()
50         println!("cargo:rustc-cfg=libc_union");  in main()
55         println!("cargo:rustc-cfg=libc_const_size_of");  in main()
60         println!("cargo:rustc-cfg=libc_align");  in main()
65         println!("cargo:rustc-cfg=libc_int128");  in main()
68     // Rust >= 1.30 supports `core::ffi::c_void`, so libc can just re-export it.  in main()
70     // backwards-compatibility.  in main()
72         println!("cargo:rustc-cfg=libc_core_cvoid");  in main()
77         println!("cargo:rustc-cfg=libc_packedN");  in main()
78         println!("cargo:rustc-cfg=libc_cfg_target_vendor");  in main()
83         println!("cargo:rustc-cfg=libc_non_exhaustive");  in main()
87         println!("cargo:rustc-cfg=libc_ptr_addr_of");  in main()
92         println!("cargo:rustc-cfg=libc_underscore_const_names");  in main()
97         println!("cargo:rustc-cfg=libc_thread_local");  in main()
102         println!("cargo:rustc-cfg=libc_const_extern_fn");  in main()
107                 panic!("const-extern-fn requires a nightly compiler >= 1.40");  in main()
109             println!("cargo:rustc-cfg=libc_const_extern_fn_unstable");  in main()
110             println!("cargo:rustc-cfg=libc_const_extern_fn");  in main()
115 fn rustc_minor_nightly() -> (u32, bool) {  in rustc_minor_nightly()
127         .arg("--version")  in rustc_minor_nightly()
142     // (e.g. "rustc 1.39.0"). Treat this case as non-nightly,  in rustc_minor_nightly()
145     let nightly_raw = otry!(pieces.next()).split('-').nth(1);  in rustc_minor_nightly()
154 fn which_freebsd() -> Option<i32> {  in which_freebsd()
155     let output = std::process::Command::new("freebsd-version").output().ok();  in which_freebsd()